What does the ligamentum venosum connect?
The ductus venosus (red), which becomes the ligamentum venosum, connects the umbilical vein to the inferior vena cava. The ligamentum venosum is the fibrous remnant of the ductus venosus of the fetal circulation. Usually, it is attached to the left branch of the portal vein within the porta hepatis.
What is recanalization of the umbilical vein?
A recanalized umbilical vein is a sonographic finding that is common in patients with cirrhosis or portal hypertension. The umbilical vein is developed in the fetus and carries oxygenated blood from… Expand. lindseysimon.weebly.com.
What does the falciform ligament connect?
The falciform ligament is the thin, sickle-shaped, fibrous structure that connects the anterior part of the liver to the ventral wall of the abdomen.
Where does a Recanalized umbilical vein drain?
The right and left vitelline veins develop into the portal vein. The left umbilical vein then drains into the left branch of the newly formed portal vein.
Is the falciform ligament The ligamentum venosum?
The falciform ligament arises at the umbilicus and continues toward the anterior aspect of the liver in continuity with the umbilical fissure (Fig. 2.79). The ligamentum venosum lies within a fissure on the inferior surface of the liver between the caudate lobe posteriorly and the left lobe anteriorly.
What is the porta hepatis?
The porta hepatis, or hilum of the liver, is a deep, short, transverse fissure that passes across the left posterior aspect of the undersurface of the right lobe of the liver. It separates the caudate lobe and process from the quadrate lobe and meets the left sagittal fossa perpendicularly (1).
What causes recanalization of the umbilical vein?
Spontaneous recanalization with blood flow in the umbilical vein may occur during portal hypertension with the spontaneously reopened umbilical vein serving as a hepatofugal, decompressing collateral.
What is a fetal remnant ligament?
Fetal remnant ligaments It is a nonfunctional vestige of the ductus arteriosus, and is formed within three weeks of birth. The ligamentum teres hepatis (the “round ligament of the liver”) represents the remnant of the fetal umbilical vein.
What is recanalization of thrombus?
Recanalization is a complex process that initially involves adhesion of the thrombus to the vein wall and an inflammatory response in the vessel wall, leading to organization and subsequent contraction of the thrombus, and to neovascularization and spontaneous lysis of areas inside the thrombus( 23.
Where is the ligamentum venosum?
Anatomical Parts The ligamentum venosum is the fibrous remnant of the ductus venosus of the fetal circulation. Usually, it is attached to the left branch of the portal vein within the porta hepatis (gateway to theliver).
How is the ligamentum venosum related to the liver?
The ligamentum venosum is a fibrous remnant which travels superiorly from the porta hepatis of the liver to the inferior vena cava. It is often obliterated in adults. In the fetus, it is patent and known as the ductus venosus which shunts blood returning from the placenta in the umbilical vein to the inferior vena cava thus bypassing the liver.
Is the ligamentum venosum patent in the fetus?
Ligamentum venosum. It is often obliterated in adults. In the fetus, it is patent and known as the ductus venosus which shunts blood returning from the placenta in the umbilical vein to the inferior vena cava thus bypassing the liver.
What causes recanalization of the paraumbilical vein?
Recanalization of the paraumbilical veins is mainly secondary to portal hypertension, which is defined as elevation of hepatic venous pressure gradient of >5 mmHg. Portal hypertension is a consequence of increased hepatic vascular resistance that can broadly be classified as prehepatic, intrahepatic or posthepatic.
When does the ductus venosum become the vena cava?
During the first week of extra-uterine life, the ductus venosum degenerates and becomes the ligamentum venosum. This slender fibrous cord passes from the left branch of the portal vein upwards in the fossa bearing its name to reach the inferior vena cava.